In this program, I have to ask the user for an employee, then the program will check to see if the file for that employee exist, if it doesnt then it will automatically create the file.

ReadNew function reads the file....check to see if it exist

CreateNew function creates a new file.

In my code I have no problem with the first part of reading file.. and my createnew function works in other programs where I am asking for input of file name to create the file name. However in this code I cannot figure how to automatically pass the input filename from the ReadNew function to the CreateNew function. I can't ask the user to enter the name a second time, so I have to pass the input filename into both functions

If you want to request the name of the file in ReadNew, then the name can either be passed back to the calling routine as a return value from the function, or as a reference parameter to the function. Alternatively, but not recommended, name could be another global variable.

A couple of points to note. For c++, the include names are cstring and cstdio, not string.h and stdio.h. Also, it is not considered good practice to have your variables defined as global. Good practice is to define them near to where they are first used with as small a scope as possible. Rather than have the file functions set a global variable, it would be more usual for these functions to return a type bool indicating whether success or not.

As 2kaud mentioned, using global variables is bad practice. Especially because you are using them to pass values between functions, which will prevent you from learning the proper way to pass values between functions and how to design your program. IMO it's also bad design to mix input/output with application logic. It would be better to split these things into separate functions. So, the outline of your program could be something like